I purchased all of my Chanel items preowned (although one was new & never used).
I buy preloved because:
• I adore pretty bags but I have other financial priorities: investing, saving, my home, traveling, and jewelry in that order - then bags. Buying discounted preloved premier bags allows me to be indulgent without ever getting in the way of my more important goals or priorities.
• I'm thrifty by nature so I feel brilliant and victorious when I score a bag for a significant discount. (Hey, it's silly but it makes me happy. LOL!)
• I prefer single flap jumbos which are discontinued.
• I like the quality of the materials (the older, more sturdy lamb, the real 24k gold plated hardware) These are no longer available new.
• I hate going into a boutique because I hate to shop.
• I don't ever need to be the first person to have something. If I like it then I buy it whenever I feel like buying it - the day it comes out or a decade later.
• If I get tired of a bag, I'll sell it. If I'm selling preloved, I'm selling off a lower cost basis than if I'd have purchased it new. I've let someone else take the majority (or all) of the depreciation hit. So I make up more of my money.
That all being said, I'm not completely opposed to buying new. I just don't see a compelling reason to do so 90% of the time.
As others have said, when your bag, please get it authenticated no matter from whom you buy. I rarely do authentications before I buy because the bag I want can get snapped up. I know that if it's fake I have protections with the retailers and my credit card. But, I also know what I'm looking for and that is a first line of defense. Knock on wood I haven't purchased a fake Chanel.
Once I get my bag, I send it in to Leather Surgeons who does an authentication with the bag in his hands and then completely cleans the bag. If any refurbishment is needed (I try to buy like new but sometimes there is something that needs to be done) he does it. I can then feel good that I have a clean pristine and most importantly authentic bag. (With non Chanel bags, I do two online authentications)
Good luck!